Final answer:
Metallic salts are included in root canal sealers to make the sealers radiopaque and have antibacterial properties.
Step-by-step explanation:
Metallic salts are included in root canal sealers to make the sealers radiopaque, which means they are visible on x-rays and can help the dentist identify the placement of the sealer during root canal treatment. This helps ensure that the entire root canal system is properly sealed.
Additionally, metallic salts can also have antibacterial properties. These salts can help kill or inhibit the growth of bacteria in the root canal, reducing the risk of infection and improving the success rate of the root canal treatment.